angle 8 Moving Day: A student gently sets a block of mass M = 3.0 kg on a ramp that makes an 30° with the horizontal. The coefficient of static friction between the block and the ramp is μ = 0.50 and μ = 0.30. When she lets go of the block, will it stay in place or will it move? If it stays in place, find the magnitude and direction of the static friction force. If it moves, find the magnitude and direction of the acceleration. -

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Q: friction

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!